[knot-dns-users] keymgr del-all-old not only for offline KSK?

The documentation for `keymgr' says that the subcommand `del-all-old' is related to offline KSK, but it also seems to work for online KSK. Moments ago I had the following keys of which e381* had just been marked as removed: $ keymgr -c knot.conf tm list -b iso e381198aea254a1dbceb3c5b153cbefaa98c959a 31943 KSK ECDSAP256SHA256 publish=2022-05-12T11:43:56Z ready=2022-05-12T11:43:56Z active=2022-05-12T11:43:56Z retire=2022-05-12T12:35:42Z revoke=2022-05-12T12:33:42Z remove=2022-05-12T12:37:42Z d68e6803daa3e3ee34dd07d6966df0c402594fb2 26288 ZSK ECDSAP256SHA256 publish=2022-05-12T12:28:18Z active=2022-05-12T12:28:18Z b0cc879e9b9f5faae647c7019a12821e62150378 62610 KSK ECDSAP256SHA256 publish=2022-05-12T12:30:49Z ready=2022-05-12T12:30:49Z active=2022-05-12T12:30:49Z $ keymgr -c knot.conf tm del-all-old OK $ keymgr -c knot.conf tm list -b iso d68e6803daa3e3ee34dd07d6966df0c402594fb2 26288 ZSK ECDSAP256SHA256 publish=2022-05-12T12:28:18Z active=2022-05-12T12:28:18Z b0cc879e9b9f5faae647c7019a12821e62150378 62610 KSK ECDSAP256SHA256 publish=2022-05-12T12:30:49Z ready=2022-05-12T12:30:49Z active=2022-05-12T12:30:49Z and the PEM key file has also been removed. Is this to be expected? Would it be a good idea to add a note to the documentation clarifying this? Best regards, -JP